Sturdy Mo/MoO2 with Densely-Distributed Heterointerface as Highly Active and Stable HER Electrodes

Abstract： The practical application of alkaline water electrolysis (AWE) has been hindered by the unsatisifactory activity and stability of HER electrodes. Here, Mo/MoO2 with densely-distributed heterointerface was constructed on nickel mesh via plasma spraying of metallic Mo powders as highly active and sturdy catalyst layer for HER electrodes. As a result, the electrode demonstrates a low overpotential of 48.7 mV@10 mA cm-2 and a prolonged stability of 500 h even under industrial conditions.